ABSTRACT
This chapter presents an overview of Insomnia and other sleep disturbance in people diagnosed with psychotic disorders, and explains the relationship between sleep and psychosis. Estimated rates of Insomnia and other sleep problems vary considerably between studies, depending on the method of assessing sleep and the criteria used to define sleep dysfunction. People with psychotic disorders report that their sleep difficulties fluctuate over time. Sleep efficiency is the percentage of time that a person in bed is actually asleep. It is assessed by calculating time spent in bed divided by time actually asleep. Irregular sleep–wake rhythms occur more commonly in people with psychotic disorders than in healthy adults and are associated with subjective complaints of poor sleep quality. Sleep dysfunction contributes to reduced daytime physical activity, as well as unhealthy lifestyle habits, including an increased reliance on alcohol, sedatives, and other drugs to get to sleep.
